Data Sheet
Thermostatic sensor RAS-C² with RA-N
Presetting Valve
Application
Approvals and Standards
RAS-C² thermostatic sensor
The RAS-C² thermostatic sensor and the RA-N
valves are designed for use in 2-pipe domestic
heating systems.
The RAS-C² thermostatic sensor is a self-actuating
proportional controller with a small P-band. It
has a temperature range from 8 to 28° C and is
equipped with frost protection setting and positive
shut-off for maximum user flexibility.
RA-N presetting valves are manufactured from
brass with nickel plating. The gland seal pressure
pin is of chromium steel and works in a lifetime
lubricated O-ring. The complete gland seal assembly
can be replaced without draining down
the system.
European Standard EN 215
Thermostatic sensors RAS-C² with RA-N presetting valves are manufactured to the highest
standards, and are approved to the European standard EN 215.
RA-FN angle valve RA-FN straight valve
In order to avoid deposition and corrosion the
composition of the hot water must be in accordance
with the VDI 2035 guideline (Verein
Deutscher Ingenieure). It is recommended that
formulations containing mineral oil are avoided.
Each RA-N valve body is supplied with a red protective cap, which can be used for manual regulation
during the construction phase. The protective
cap must not be used as a manual shut off
device. A special manual shut off device is available
as an accessory.
A comprehensive range of compression fittings
for PEX, AluPEX, copper and steel tubes are available
- please require special data sheet for Danfoss
compression fittings.
Danfoss Heating Solutions VDAVE402 © Danfoss 07/2015
Data Sheet Thermostatic sensor RAS-C² with RA-N Presetting Valve
Ordering and Specifications
RAS-C² thermostatic sensor
Type Design Setting range
2
RAS-C
Built-in sensor, frost protection, positive shut-off 8 - 28 °C 013G6040
1)
Code no.
RA-N radiator valves
Connec-
tions
Type Design
RA-N 10
RA-N 15
RA-N 20
RA-N 25
Angle
Straight 013G0012
Angle
Straight 013G0014
Angle
Straight 013G0016
Angle
Straight 013G0038
Out-
Inlet
let
Rp R 1 2 3 4 5 6 7 N N ˚C
3/8 3/8 0.04 0.08 0.11 0.18 0.21 0.28 0.31 0.43 0.65 120
1/2 1/2 0.04 0.08 0.12 0.18 0.25 0.32 0.38 0.53 0.90 120
3/4 3/4 0.09 0.14 0.18 0.25 0.31 0.40 0.51 0.71 1.40 120
1 1 0.09 0.14 0.18 0.25 0.31 0.40 0.51 0.71 1.40 120
kv-max.1) (m3/h at ∆p = 1 bar) k
Technical data
Max. working pressure: 10 bar, max. diff. (2) pressure: 0.6 bar, test pressure: 16 bar Max working temperature 120°C
1) The kv-value indicates the water flow (Q) in m³/h at a pressure drop (Δp) across the valve of 1 bar;
kv = Q:
At setting N the kv-value is stated according to EN 215, at XP = 2K i.e. the valve is closed at 2°C
√ p
higher room temperature. At lower settings the XP value is reduced to 0.5K of the setting value 1. The
kvs-value states the flow Q at a maximum lift, i.e. at fully open valve at setting N.
Presetting
Max.
work.
temp.
vs
Code no
013G0011
013G0013
013G0015
013G0037
Accessoires
2) Working pressure = static + differential pressure. The maximum differential pressure specified is the
maximum pressure at which the valves give satisfactory regulation. As with any device which imposes
a pressure drop in the system, noise may occur under certain flow/pressure conditions. To ensure quiet
operation, maximum pressure drop should not exceed 30 to 35 kPa. The differential pressure can be
reduced by the use of the Danfoss differential pressure regulators types AVD, AVDL, AVDS, IVD or ASV-P.
Product Dimension For valve body Code no.
Gland seal (10pcs.) - All RA-N valves 013G0290
Compression fitting for steel and
copper tubes (10pcs.)
Rp 3/8 x Ø10 mm
Rp 3/8 x Ø12 mm 013G4102
RA-N 10
Rp 1/2 x Ø10 mm
Rp 1/2 x Ø12 mm 013G4112
RA-N 15
013G4100
013G4110
Rp 1/2 x Ø15 mm 013G4115
2 VDAVE402 © Danfoss 07/2015
Data Sheet Thermostatic sensor RAS-C² with RA-N Presetting Valve
Capacities
RA-N 10
mWs
t=15 C
t=20 C
t=40 C
[
bar
0,08
0,06
0,05
0,04
0,03
0,02
0,01
1
0,8
0,6
0,5
0,4
0,3
0,2
p
0,1
o
o
RA-N 10
]
5710 20 30 40 50 70 100 200 300 400 500 700 1000
4321
0,03 0,05 0,07 0,10,02
0,070,03
0,05 0,1
0,070,05 0,1 0,2 0,3
0,5o0,4 0,7 1 2 43 5 7 10 20 30 40
10
8
6
5
4
3
2
p
]
1
0,8
0,6
0,5
0,4
0,3
0,2
0,1
123456
o
V [l/h]
7
N
100
80
60
50
40
30
20
p
kPa
[]
10
8
6
5
4
3
2
1
kW
107543210,70,50,40,30,2
200,2 0,3 0,4 0,5 0,7 12345710
kW
kW
RA-N 15
mWs
[
]
t=15 C
t=20 C
t=40 C
[
0,08
0,06
0,05
0,04
0,03
0,02
bar
0,01
1
0,8
0,6
0,5
0,4
0,3
0,2
p
0,1
o
o
RA-N 15
]
5710 20 30 40 50 70 100 200 300 400 500 700 1000
4321
0,03 0,05 0,07 0,10,02
0,070,03
0,05 0,1
0,070,05 0,1 0,2 0,3
0,5o0,4 0,7 1 2 43 5 7 10 20 30 40
10
8
6
5
4
3
2
p
1
0,8
0,6
0,5
0,4
0,3
0,2
0,1
123456
o
V [l/h]
7
N
100
80
60
50
40
30
20
p
kPa
[]
10
8
6
5
4
3
2
1
kW
107543210,70,50,40,30,2
200,2 0,3 0,4 0,5 0,7 12345710
kW
kW
Danfoss Heating Solutions VDAVE402 © Danfoss 07/2015
Data Sheet Thermostatic sensor RAS-C² with RA-N Presetting Valve
Capacities
RA-N 20/25
[
mWs
]
t=15 C
t=20 C
t=40 C
[
bar
0,08
0,06
0,05
0,04
0,03
0,02
0,01
1
0,8
0,6
0,5
0,4
0,3
0,2
p
0,1
o
o
RA-N 20
]
5710 20 30 40 50 70 100 200 300 400 500 700 1000
4321
0,03 0,05 0,07 0,10,02
0,070,03
0,05 0,1
0,070,05 0,1 0,2 0,3
0,5o0,4 0,7 1 2 43 5 7 10 20 30 40
10
8
6
5
4
3
2
p
1
0,8
0,6
0,5
0,4
0,3
0,2
0,1
123456
o
V [l/h]
7
N
100
80
60
50
40
30
20
p
kPa
[]
10
8
6
5
4
3
2
1
kW
107543210,70,50,40,30,2
200,2 0,3 0,4 0,5 0,7 12345710
kW
kW
Sizing example Required heat: 0.7kW
Cooling across radiator: 20°C
Flow through radiator: Q= =0.03m3/h=0.0083 l/s
Pressure drop across valve: p=1mwg
0.7
20 x 1.16
Valve setting: RA-N10 3
RA-N15 3
RA-N 20/25 4
Alternatively the setting can be read directly in the table
”Ordering and Specifications”:
kv = Q: (m³/h)
√ p (bar)
Presetting
Note:
As with any device which imposes a pressure
drop in the system, noise may occur under certain
flow/ pressure conditions.
The presetting values of RA-N valves can be
adjusted easily and accurately without the use of
tools (factory setting = N):
• Remove protective cap/thermostatic
sensor
• Find reference mark
• Lift and turn setting ring until the aquired
presetting aligns with the reference mark.
Presetting can be selected in steps from 1 to 7.
To ensure quiet operation, maximum pressure
drop should not exceed 30 - 35 kPa (3 - 3.5 mwg).
Presetting
range
Factory setting and
one-pipe system
Reference mark
At setting N the valve is fully open. This setting
can be used as a flushing position, if the system
has to be flushed out because of dirt problems.
In one-pipe installations, the setting N must be
used.
Settings outside 1 to 7 and N should be avoided.
When the thermostatic sensor has been installed,
the presetting is protected against unintended
regulation.
4 VDAVH302 © Danfoss 06/2015 Danfoss Heating Solutions
Data Sheet Thermostatic sensor RAS-C² with RA-N Presetting Valve
ø50
76.9 - 83.8
H
H
Design
Dimensions
RAS-C2
23
1
1. Actuator
2. Setting dial
3. Safety spring
4. Bellows
4
5
5. Spindle
6. Socket
7. Union nut
RA-N
6
7
1. Gland seal
2. O-Ring
3. Pressure pin
4. Seal
5. Regulation spring
6. Setting dial
7. Valve body
8. kv-nozzle
Danfoss A/S
Heating Solutions
Haarupvaenget 11
8600 Silkeborg
Denmark
Telehone: +45 7488 8000
Fax: +45 7488 8100
Email: heating.solutions@danfoss.com
www.heating.danfoss.com
S
2
d
1
L
4
Arc. flats
S
1
d
Type
ø40.5
13
ISO 7-1
D d
S
S
2
1
1
1
H
3
H
D
L
d
2
L
1
L
2
L
1
L
2
2
d
2
d
1
L
3
4
2
1
H
3
H
5
L
S
1
D
L
5
L
L
3
RA-N 10 G 3/8 G 5/8 A R 3/8 50 75 24 49 20 91.9 - 98.8 22 27
RA-N 15 G 1/2 G 3/4 A R 1/2 55 82 26 53 23 91.9 - 98.8 27 30
RA-N 20 G 3/4 G 1/1 A R 3/4 65 98 30 63 26 96.9 - 103.8 32 37
RA-N 2 G 1/1 G 5/4 A R 1/1 90 123 40 75 34 96.9 - 103.8 41 46
2
S
2
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conditions s’appliquent également à des produits en cours de livraison, à condition toutefois que les modifications éventuelles n’affectent pas les spécifications antérieurement convenues par écrit. Les
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droits réservés.
Danfoss Heating Solutions VDAVE402 © Danfoss 07/2015 5
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